| Rogowski Coil |
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One advantage of a Rogowski coil over other types of Current Transformer s is that it can be made open-ended and flexible, allowing it to be wrapped around a live conductor without disturbing it. Since a Rogowski coil has an air core rather than an Iron core, it has a low Inductance and can respond to fast-changing currents. Also, because it has no iron core to saturate, it is highly linear even when subjected to large currents, such as those used in Electric Power Transmission , Welding , or Pulsed Power applications. A correctly formed Rogowski coil, with equally spaced windings, is largely immune to Electromagnetic Interference . A device similar to the Rogowski coil was described by A.P. Chattock of Bristol University , ("On a magnetic potentiometer", ''Philosophical Magazine and Journal of Science'', vol. XXIV, no. 5th Series, pp. 94–96, Jul-Dec 1887 ). Chattock used it to measure Magnetic Field s rather than currents. The definitive description was given by W. Rogowski and W. Steinhaus in "Die Messung der magnetischen Spannung", ''Archiv für Elektrotechnik'', 1912, 1, Pt.4, pp.141-150. SEE ALSO EXTERNAL LINK
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